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D. A. RBGAN, D. SAUPP 8v A. A. HIBBS.

STEAM BoILBR.

N0. 492,766. 'Patented Feb. 28'. 1893.

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D. A. REAGAN, F. llsAUP 8v A. A. HIBBS. STB-AM BOILER.-

No. 492,766. Patented Feb. 28', 1893.

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D.. A. REAGAN, P. D. SAUPP 85A) HIBBS. STEAM BOILER.

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DOMINIOK A. REAGAN, FRANK D. SAUPP, AND AUGUSTINE ARLINGTON HIBBS, OF ALTOONA, PENNSYLVANIA, ASSIGNORS TO THEMSELVES, JOHN Z. KINOH, AND OLIVER H. ORMSBY, OF SAME PLACE.

STEAIVI-BOILER.

SPECIFICATION forming part of Letters Patent No. 492,766, dated February 28, 1893. Application filed April 19. 1892. Serial No. 429.755. (No model.)

To all whom it may concern.-

Be it known that we, DoMINIcKA. REAGAN, FRANK D. SAUPP, and AUGUSTINE ARLING- TON HIBBS, all of Altoona, county of Blair, and State of Pennsylvania, have invented a certain new and useful Improvement in Steam- Boilers, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part of this specification.

Our invention relates to the construction and operation of steam boilers, and has for its object to economize steam and secure a better circulation of water.

An essential feature of our invention is of the use of twosteam boilers containing steam of different pressure and combined with an engine so that the engine receives steam from the low pressure boiler and exhausts to a greater or less extent back into the same boiler. Ajet of steam from the high pressure boiler being used to carry the exhaust steam back into the low pressure boiler. Preferably we construct our two boilers in a single shell, dividing it by means of partitions, and we secure a better circulation of the water by connecting the bottoms of the two boilers by small pipes so that Water from the high pressure boiler is forced into the low pressure boiler. In this Waya practical circulation of the Water is secured in both boilers.

Our invention will be best understood as described in connection with the drawings in which it is illustrated, and in which Figure 1 is a longitudinal vertical section of a locomotive boiler constructed in accordance with our invention its tire box, smoke box, &c., taken on section line 3 4 of Fig. 2. Fig. 2 is a horizontal section taken on the line 1 2 of Fig. 1. Fig. 3 a plan view of part of the boiler, the dome being shown in section on the line 7 8 of Fig. l. Fig. 4. is a cross sectional view on the line 5 6 of Fig. 1, a part of the dome being broken away to show its internal construction. Fig. 5 is a cross section on the line 11-12 of Fig. 1. Fig. 6 a cross section on the line 9 10 of Fig. l. Fig. 7 a sectional view on the line 13 14 of Fig. 1.

A is the boiler shell which is divided into two boilers by means of partitions B, the part marked A being the high pressure boiler and the part marked A2 the low pressure boiler.

O indicates the ash box, O the grate and O2 the lire box.

D is an air pump having a delivery pipe D" leading into the ash box as shown at D2.

E is the fire door.

F is the dome, which like the rest of the boiler is divided by the partition B into a high pressure side F and low pressure side F2.

G is the steam pipe leading from the low pressure dome to the cylinder or engine indicated at P. `The admission of steam to pipe G is regulated by a valve G', which, as shown has a stem G2 connecting with a bell crank lever G3 which is connected by a rod indicated at G4 with a lever G5 at the front of the boiler.

I-I indicates the exhaust pipe leading from the cylinder or engine, as sl1own,itis brought up into smoke box I opening at H beneath the stack I. It is also provided with a valve H2 by which its opening into the smoke box can be opened and closed at will. This valve is connected with a lever H3 which in turn is actuated by a connection indicated at H4 and leading to a lever Hsat the front of the boiler. Below the valve H2a conduit J leads up from the exhaust pipe, and to a pipe or conduit K which enters the low pressure side A2 of the boiler, and valve J situated in the conduit J prevents the escape of steam, but opens freely when the suction tending to draw the exhaust into the boiler overcomes the pressure of steam in the boiler.

L is a steamv pipe leading from the high pressure side of the dome into the pipe K having a nozzle l so situated in said pipe K as to form with it an ejeeting device, the nozzle Z and the pipe K being in effect and in connection with the pipe J an ejector of a familiar character. The admission of steam to pipe L is regulated by a valve L', the stein L2 of which connects with one arm of aleverL3, from the other arm of which a connection L4 leads to a lever I.5 at the front of the boiler.

The operation of the device above described can be readily followed. Steam from the low pressure side of the boiler passes through pipe G to the cylinder, and the exhaust from the cylinder passes through a conduit at the roo . ure steam creates a strong suction in the pipe K and its connected pipe J, and this suction draws the exhaust steam into pipe J lifting the valve J and the mixed high pressure and exhaust steam pass back into the low pressure boiler. The Valve H2 is of course closed at the same time that the ejector is set in operation.

Referring now to another feature of our invention O O O, duc. indicate small pipes leading from the bottom of the high pressure boiler to the bottom of the low pressure boiler. These pipes are quite small as their function is not necessarily to supply the low pressure boiler with Water, but merely to cause jets of water forced out of the high pressure boiler t0 be forced upward in thelow pressure boiler. The advantage of this is two-fold; rst, because it causes a downward movement of the water in the high pressure side, and secondbecause it causes an upward movement of the water in the bottom of the low pressure side: in this way the cold and hot water in each side of the boiler are thoroughly and efficiently mixed together and the efficiency of the boiler materially increased.

WVe have also shown in Fig. 4 of' the drawings an automatic valve N which may be ot' any usual kind, and which Will permit the escape of steam from the high pressure to the low pressure side whenever the pressures vary beyond a normal standard; this is intended for use especially when the pipes O are employed for creating circulation as above described.

In order to provide a draft in the locomotive fire box we have shown a pipeDleading from air pump D to the fire box.

Having now described our invention, What we claim as new, and desire to secure by Letters Patent, is-

1. The combination of two boilers containing steam at different pressure, a steam conduit leading from the low pressure boiler to an engine, an exhaust conduit having an escape controlled by a valve and a connection J K leading to the low pressure boiler from a point below said valve, and a steam conduit leading into the connection K from the high pressure boiler and forming an ejector as described.

2. The combination of high and low pressure boilers arranged as described so that the low pressure boiler receives steam in part from the high pressure boiler, and water pipes O connecting the bottoms of the two boilers, so as to effect a vertical circulation therein, substantially as specified.

3. A boiler shell A divided into high and low pressure divisions A and A2, an engine, a steam conduit leading from the low pressure division to the engine, an exhaust and a connection therefrom to the low pressure boiler and a steam conduit leading from the high pressure boiler to said connection and forming an ejector therewithio force the exhaust steam in against the boiler pressure.

DOMINIOK A. REAGAN. 'FRANK D. SAUPP. A. ARLINGTON I-IIBBS.

Witnesses:

JN0. Z. Kinos, O. H. ORMsBY. 

